Sometimes this can be caused by aphids. If you've hosed off your tree and treated with Spinosad, you should be fine. Be sure to treat for ants as well, if they're climbing through the tree, as they will keep the aphids alive and farm them. So, ant treatment should also be included if you see ants. And, sometimes you can see some leaf curling due to too much nitrogen - not to worry about, just can disfigure the leaves a bit. If the tree receives way too much N, that can cause the fruit to have thickened skin, and not taste as good, but I don't think you've overdone the fertilizing to this extent. If you're concerned, you can always cut down your Foliage Pro to 1/2 strength monthly, or full strength every other month.

Patty S.

Also, looks like you might have a little sprout emerging from down on the rootstock (see the sprout down my the white wrap tag). Just thumb it off.